JPH1165384A - Belt carrying device and recorded material regenerating device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt carrying device having an inexpensive belt abnormality detection means for detecting both of the tear of a belt-like member and the abnormality of excessive belt bias without causing any malfunction due to the contamination of dust and the like and to provide a recorded material regenerating device using the belt carrying device. SOLUTION: When the breadth of a peeling belt, arrangement width between belt surface detectors and the meandering width of the peeling belt are respectively defined as 2×L0 , 2×L and 2×L1 , both belt surface detectors are arranged so that L0 -S>L is attained between a peeling device and a cleaning device positioned on the more carrying direction side of the peeling belt than the peeling device and they are positioned near both edge parts of the peeling belt as much as possible. Thus, since fillers 51 and 52 are pressured and brought into slidable contact with the peeling belt as long as the peeling belt is meanderingly carried within the range of whole meandering width 2×L1 on a condition that the periphery of both edge parts thereof are not torn, the belt bias within the bias control width of a belt bias remedy means is not detected as the excessive belt bias.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveying device having a belt-like member driven so as to move along a predetermined path, and an image forming material on a surface by an image forming device such as a facsimile or a printer. The present invention relates to a recording material reproducing apparatus using the above-described belt transport device in an apparatus for removing an image forming substance from an adhered recording material and reproducing the recording material in a reusable state. The present invention relates to a belt abnormality detection technique for detecting both excessive belt deviation.

[0002]

2. Description of the Related Art In recent years, printers, copiers, and printing machines using image forming methods such as an electrophotographic method, a thermal transfer method, an ink jet method using hot melt ink, and a printing method have become widespread, and a large amount of paper has been produced. in use. However, since paper, which is generally used as a recording material on which images are formed, is made from pulp obtained from wood, consuming a large amount of paper leads to deforestation and deterioration of the global environment, In recent years, it has become a social problem. Furthermore,
There is also a problem that a large amount of recording material on which an image is formed by these image forming methods is discarded, and it becomes difficult to dispose of refuse.

As a transparent sheet as a recording material for an overhead projector (OHP), a plastic film such as a polyester film or an acetate film is generally used as a base material. The raw material of the film is synthesized from fossil materials such as petroleum,
It is manufactured from wood like paper, and it is preferable to use a large amount of a transparent sheet as a recording material for an overhead projector (OHP) from the viewpoint of protection of petroleum resources and protection of the global environment. Absent. Also, O
In the case of an HP sheet, when the paper is processed with a shredder, the wear of the shredder blade is remarkable.
There is a problem that the recording material processed because of mixing with the sheet cannot be reused. For this reason, conventionally, the OHP sheet is often discarded as it is,
There is also a problem in keeping confidentiality of the image information formed on the P sheet.

As a means for solving these problems, a recording material reproducing technique for removing an image from a recording material on which an image is formed and enabling reuse thereof has been developed. A recording material reproducing method for separating an image forming material from a recording material by contacting and separating the image forming material attached to the recording material while conveying the belt-shaped peeling member by a belt driving roller (Method of removing image-forming substance) and a number of apparatuses therefor have been proposed (for example, JP-A-2-55195 and JP-A-4-64475).

In this type of recording material reproducing apparatus, the length of both edges of the belt-like peeling member is slightly different,
Since there is a limit in the parallel accuracy of the plurality of support members that movably support the belt-shaped peeling member, the belt may be shifted from the transport path to the longitudinal direction side of the support member and the belt may be shifted. For this reason, the belt-shaped peeling member may be broken due to a fold, or the belt-shaped peeling member may be caught by the support member, thereby applying a large load to the support member or the drive system member to cause breakage. was there.

Accordingly, the present applicant has filed Japanese Patent Application No. Hei 6-2958.
In No. 05, a belt shift of the belt-shaped peeling member is detected by a belt shift detection sensor, and based on the detection result,
Belt shift correcting means for correcting the belt shift of the belt-shaped peeling member by controlling a contact position adjusting device that adjusts a position where the driving roller that rotates and the edge of the belt-shaped peeling member comes into contact is provided. A recording material reproducing apparatus (image forming substance removing apparatus) has been proposed.

On the other hand, in an apparatus for removing an image forming substance from a recording material as proposed in Japanese Patent Application Laid-Open No. 2-55195, in order to maintain the stripping performance of the belt-shaped stripping member, the belt-shaped stripping member is removed. It is desirable to provide a cleaning device that removes and cleans the image forming substance adhered thereon. In such a cleaning device,
The rotating cleaning member is brought into pressure contact with a backup member or a driving member having a backup function via the belt-shaped peeling member while the rotating cleaning member is brought into contact with the surface of the belt-shaped peeling member to which the image forming substance is adhered in a counter manner. Accordingly, a method of scraping and cleaning the image forming substance is generally used, and this type of cleaning device is also provided in Japanese Patent Application No. 6-295805 provided with the above-described belt shift correcting means. .

However, in the above-mentioned cleaning device, the belt-like peeling member is broken,
When the backup member or the like comes into direct contact with the cleaning member, the surface of the backup member or the like is partially damaged. When such a partial defect occurs, the contact pressure between the belt-shaped peeling member and the cleaning member is partially reduced and cleaning is not sufficiently performed, so that the remaining image forming substance is gradually filmed. A layer is formed, and the peeling performance of the recording material reproducing apparatus is significantly reduced. Therefore, when the belt-like peeling member is torn, it is necessary to replace not only the belt-like peeling member but also the above-mentioned backup member or the like whose surface has a partial defect.

[0009] Partial loss of the backup member or the like also occurs when the backup member or the like comes into direct contact with the cleaning member due to excessive belt deviation of the belt-shaped peeling member. The recording material reproducing apparatus disclosed in Japanese Patent Application No. 6-295805 is provided with a belt deviation correcting means. However, when the belt deviation sensor malfunctions, excessive belt deviation exceeding the deviation control width occurs, and the backup member Etc. may cause partial loss.

[0010]

Means for detecting the breakage of the belt-like peeling member as described above includes a large optical sensor, for example, a large CCD sensor, along the width direction of the belt-like peeling member. Means for arranging them and monitoring the surface of the belt-shaped peeling member to detect them can be considered. As means for detecting excessive belt deviation of the belt-shaped peeling member, an excessive belt deviation detecting means for detecting excessive belt deviation is provided near a light belt deviation detection sensor provided for the belt deviation correcting means. Means for detection by separately providing a belt shift detection sensor may be considered.

However, if these two means are provided at the same time, a large number of sensors are required, and the configuration of the recording material reproducing apparatus becomes complicated, so that there is a problem that the cost is high and maintenance becomes difficult.

Further, in the above-described means for detecting the breakage of the belt-shaped peeling member, there is a risk that the surface of the CCD sensor or the like is contaminated by dust or the like, thereby causing a malfunction.

The present invention has been made in view of the above problems, and the objects of claims 1 to 6 are as follows.
A belt transport device having a belt abnormality detecting means capable of detecting both a break of a belt-shaped member and an excessive belt deviation abnormality at a low cost, without malfunction due to contamination of dust and the like, and a belt transport device including the belt transport device. An object of the present invention is to provide a used recording material reproducing apparatus.

It is a further object of the present invention to provide a peeling device for peeling an image forming substance from a recording material on a surface of a belt-like peeling member, and an image forming substance adhered to the surface. In a recording material reproducing apparatus using a belt transport device driven to move via a backup member and a cleaning device that removes the backup member using a cleaning member, the backup member is removed by using the belt abnormality detecting means. An object of the present invention is to provide a recording material reproducing apparatus having a function of preventing damage to a recording material.

[0015]

According to one aspect of the present invention, there is provided a belt conveying apparatus having a belt-shaped member driven so that a surface moves along a predetermined path. A lever-shaped member, which is disposed near the edge of the belt-shaped member and whose leading end is in sliding contact with the surface of the belt-shaped member, and a lever operation detecting member that detects an operation of the lever-shaped member in a pressing direction. A belt surface detector is provided.

According to the first aspect of the present invention, when the tip of the lever-shaped member does not come into sliding contact with the surface of the belt-shaped member, the lever-shaped member operates in the pressing direction. next,
The lever operation detecting member detects the operation of the lever-shaped member, thereby detecting detachment of the pressure sliding contact portion. Thus, the belt surface detector physically detects the surface of the belt-shaped member.

Here, when the belt-shaped member shifts toward the belt and the tip of the lever-shaped member does not come into contact with the belt-shaped member, the pressure sliding contact portion comes off. Also, when a tear hole is formed near the edge of the belt-shaped member,
The tip of the lever-shaped member falls into the tear hole, and the pressure sliding contact portion is separated. Therefore, the belt surface detector detects both the shift of the belt-shaped member toward the belt and the tear hole near the edge of the belt-shaped member. In the case where a belt-shaped member such as the belt-shaped member is subjected to stress, breakage often starts from an edge weak to directional stress. Most of the belt breaks can be detected by monitoring the nearby break holes.

According to a second aspect of the present invention, there is provided the belt conveying apparatus according to the first aspect, wherein the belt surface detector is arranged in a pair near both edges of the belt-shaped member.

According to the second aspect of the present invention, a pair of the belt surface detectors are provided near both edges of the belt-like member, and the pair of lever-like members are provided near both edges of the belt-like member. Press and slide.

According to a third aspect of the present invention, in the belt conveying device of the second aspect, a belt deviation correcting means for automatically correcting a slight deviation of the belt toward both edges of the belt-shaped member is provided. And the difference between the deviation control width at the edge of the belt-shaped member of the belt deviation correction means, is larger than the arrangement width between the two belt surface detectors, and, the center line of the arrangement width, The two belt surface detectors are arranged so that the center line of the maximum meandering width when the belt-like member meanders by the belt deviation correcting means overlaps.

According to the third aspect of the present invention, the difference between the width of the belt-shaped member and the deviation control width at the edge of the belt-shaped member of the belt deviation correcting means is determined by the arrangement width between the two belt surface detectors. And both belt surface detectors are arranged such that the center line of the arrangement width and the center line of the maximum meandering width when the belt-shaped member meanders by the belt deviation correcting means overlap with each other. Therefore, even when both edges of the belt-shaped member are each shifted to the maximum within the shift control width, the two belt surface detectors are respectively moved from both edges of the belt-shaped member. Are also located on the width center line side of the belt-shaped member. Therefore, the tip end of the lever-shaped member and the surface of the belt-shaped member are in pressure sliding contact with each other as long as the belt-shaped member is meandered and conveyed within the deviation control width in a state in which both edges are not broken, A slight belt deviation within the deviation control width is not detected as an abnormality.

According to a fourth aspect of the present invention, there is provided the image forming apparatus, wherein the surface of the belt-shaped peeling member capable of exerting a larger adhesive force to the image forming material than the recording material has the surface adhered to the recording material. A peeling device that peels the image forming material from the recording material by contacting and separating with the forming material; and the image forming device that is located on the transport direction side of the belt-like peeling member from the peeling device and adheres to the surface. In a recording material reproducing apparatus using a belt conveying device driven to move via a cleaning device for removing a substance, near the both edges of the belt-shaped peeling member, and A lever-shaped member that is disposed in a pair between the cleaning device and the leading end of the lever-shaped member that comes into sliding contact with the surface of the belt-shaped peeling member under pressure, and a lever operation detecting member that detects an operation of the lever-shaped member in the pressing direction Belt table with In which it characterized in that a detector.

In the fourth aspect of the present invention, the two belt surface detectors detect both a belt shift of the belt-like peeling member and a tear near both edges. The two belt surface detectors are provided between a peeling device that applies stress to the belt-shaped peeling member and the cleaning device that is located closer to the transport direction of the belt-shaped peeling member than the peeling device. Therefore, when a break occurs near both edges of the belt-shaped peeling member, the break is detected before passing through the cleaning device.

According to a fifth aspect of the present invention, in the recording material reproducing apparatus of the fourth aspect, there is provided belt deviation correcting means for automatically correcting a slight deviation of the belt in the direction of both edges of the belt-shaped peeling member, The arrangement width between the two belt surface detectors, the width of the belt-shaped peeling member, and the maximum meandering width when the belt-shaped peeling member meanders by the belt deviation correcting means,
The respective members are arranged such that the respective center lines of the length of the backup member in the belt width direction and the length of the cleaning member in the belt width direction are all overlapped. The difference between the correction control means and the deviation control width at the edge of the belt-like peeling member is larger than the arrangement width between the two belt surface detectors, and the length of the backup member in the belt width direction and the belt-like peeling. The difference between the width of the member and the difference between the width of the belt-shaped peeling member and the length of the cleaning member in the belt width direction is larger than the deviation control width at the edge of the belt-shaped peeling member. It is assumed that.

In the fifth aspect of the present invention, the difference between the width of the belt-like peeling member and the deviation control width at the edge of the belt-like peeling member is larger than the arrangement width between the two belt surface detectors. And, both belt surface detectors are arranged so that the center line of the arrangement width and the center line of the maximum meandering width when the belt-shaped peeling member meanders by the belt deviation correcting means overlap. Therefore, even when both edges of the belt-shaped peeling member are respectively shifted to the maximum within the shift control width, the two belt surface detectors are respectively provided with both edge portions of the belt-shaped peeling member. It is further located on the width center line side of the belt-shaped peeling member. Therefore, as long as the belt-shaped peeling member is meandered and conveyed within the deviation control width of the belt deviation correcting means in a state in which both edges are not torn, the distal ends of the both lever-shaped members and the belt-shaped member are not conveyed. The surface is in pressure sliding contact. Further, respective center lines of the arrangement width between the two belt surface detectors, the width of the belt-shaped peeling member, the length of the backup member in the belt width direction, and the length of the cleaning member in the belt width direction. Are arranged so that they all overlap, the difference between the length of the backup member in the belt width direction and the width of the belt-shaped peeling member, and the width of the belt-shaped peeling member and the length of the cleaning member in the belt width direction. Is larger than the deviation control width at the edge of the belt-shaped peeling member, respectively.
As long as the belt-like peeling member is conveyed in a meandering manner within the deviation control width of the belt deviation correcting means in a state where both edges are not broken, the backup member and the backup member are provided at both edges of the belt-like peeling member. There is no direct sliding contact with the cleaning member.

According to a sixth aspect of the present invention, in the recording material reproducing apparatus using the belt conveying device according to the fifth aspect, the cleaning device includes a rotating cleaning member and the belt-like peeling member. A backup member that is in contact with the belt, and at least means for stopping rotation of the cleaning member when the belt surface detector does not detect the surface of the belt-shaped peeling member. is there.

In the sixth aspect of the present invention, when the belt surface detector does not detect the surface of the belt-shaped peeling member, at least the rotation of the cleaning member is stopped, and the rotation of the cleaning member is stopped. Prevent direct sliding contact.

[0028]

FIG. 1 is a schematic block diagram of a reproducing apparatus according to the present embodiment. In FIG. 1, a recording material 1 on which an image is formed by electrophotography or the like and which is no longer necessary.
Is manually introduced into the holding portion of the conveying roller pair 2.
The transport roller pair 2 is driven by a drive device (not shown),
The recording material 1 is sent out to the liquid supply unit 10. (Hereinafter, margin)

Liquid supply section 10 from which recording material 1 is conveyed
Is composed of a liquid supply tray 14, a liquid supply roller 13, a liquid application roller 12, a holding roller 11, and the like for holding a stripping liquid 15 made of water, a surfactant, and the like inside. The liquid application roller 12 is driven by an unillustrated drive roller
The recording material 1 is rotated in the same direction as the conveyance of the recording material 1 so as to be equal to the linear velocity of the recording material 1. The liquid supply roller 13 is disposed so that a part thereof is immersed in the stripping liquid 15 as shown in FIG.
The liquid supply roller 13 supplies the stripping liquid 15 to the liquid coating roller 12 while rotating by a portion not immersed in the stripping liquid 15 being in sliding contact with the liquid coating roller 12. The liquid application roller 12 applies the stripping liquid 15 to the recording material 1 by coming into contact with the recording material 1.

The peeling belt 22 shown in FIG. 1 is made of a synthetic resin which is heat-resistant, abrasion-resistant and chemical-resistant and has a high adhesiveness to an image-forming substance and is formed in a thin endless belt shape. In a state where the image forming surface of the recording material 1 to which the release liquid 15 has been applied and the release belt 22 are superimposed, the recording material 1 is heated and the recording material 1 and the release belt 22 are pressed. The apparatus 20 includes a metal heating drum 21 having a built-in heater 29 such as a halogen lamp, a metal pressure roller 28 having a surface coated with an elastic member such as silicone rubber, a supporting roller 24, a heating drum 21, and the like. A driving roller 23 for transmitting a drive to the peeling belt 22, a tracking roller 25, a backup roller 27 for cleaning,
It is composed of an endless belt-shaped peeling belt 22 provided so as to inscribe the rollers 23, 24, 25, 27, and 28.

The heating drum 21 is driven to rotate in the direction of the arrow by rubbing against the rotating drive roller 23. Pressure is applied between the pressure roller 28 and the heating drum 21 by a biasing means such as a spring or a hydraulic pressure (not shown), and a nip is formed between the roller and the drum. The tracking roller 25 is configured so that tension is applied to the endless belt-shaped peeling belt 22 by the tension springs 26a and 26b.

The recording material 1 on which the image forming surface has been coated with the release liquid 15 by the liquid supply unit 10 is inserted between the heating drum 21 and the release belt 22 in the vicinity of the support roller 24, and And the peeling belt 22 are superimposed. Recording material 1 having release liquid 15 on its surface
Is heated by the heating drum 21 in a path from the support roller 24 to the drive roller 23. By this heating, the image forming material on the recording material is softened, and the adhesive force of the peeling belt 22 to the image forming material is reduced.
Is larger than the adhesive force of the toner to the image forming substance. Here, the pressure roller 28 presses the contact surface between the softened image forming substance and the peeling belt 22 to promote the adhesion between the image forming substance and the peeling belt 22.

Further, in the peeling device 20, the surface temperature of the heating drum 21 is adjusted so that the image forming substance of the image formed on the recording material 1 reaches a temperature equal to or higher than the softening point. The heater 29 is turned on / off by a control circuit (not shown) so as to make contact with the heater 28.

The recording material 1 heated and pressed in the peeling device 20 is separated from the separation claw 3 near the driving roller 23.
0, the softened image forming substance is separated from the surface of the recording material 1 on which the softened image forming substance is separated, and the peeling belt 2 is removed.
2 is transferred. Thereafter, the recording material 1 is discharged to the outside of the recording material reproducing device by the discharge rollers 60 and 61.

Next, the cleaning device 40 for cleaning the surface of the peeling belt 22 will be described in detail. As shown in FIG. 1, the cleaning device 40 includes a cleaning roller 41 as a roller-shaped cleaning member having a spiral edge on an outer peripheral portion that comes into contact with the surface of the peeling belt 22. A drive motor 1 as a drive unit that rotates in the counter direction with respect to the transport direction, and a collection blade as an auxiliary cleaning unit that assists removal of an image forming substance before and after a contact portion between the peeling belt 22 and the cleaning roller 41. 43.

A backup roller 27 as a backup member is pressed against the cleaning roller 41 in the direction of arrow A via the cleaning roller 41. The surface portion of the backup roller 27 is formed of an elastic body, and forms a nip by being pressed against the cleaning roller 41. By the pressure contact of the backup roller 27, the edge of the cleaning roller 41 comes into contact with the image-forming substance-adhering surface of the peeling belt 22 with a predetermined contact force, so that the image-forming substance can be reliably scraped off at the edge.

Next, a description will be given of an operation of correcting the belt deviation in the recording material reproducing apparatus. The tension springs 26a and 26b are swung in directions opposite to the directions of arrows A and B in FIG. 1 by driving not shown. As a result, the tracking roller 25 is inclined with a difference in height at both ends, and the tracking roller 25 and the peeling belt 2 are inclined.
The contact position with the second 2 changes. In this apparatus, the position of the tracking roller 25 and at least one edge of the peeling belt 22 at which contact is started is adjusted, thereby correcting the belt deviation of the peeling belt 22.

Here, the reason why the belt deviation of the peeling belt 22 can be corrected by adjusting the position where the contact between the tracking roller 25 and at least one edge of the peeling belt 22 is started will be described. FIG. 2 is an explanatory diagram illustrating a position where the peeling belt 22 first contacts the tracking roller 25 from the upper surface direction. As shown in FIG. 2A, a line segment L4 indicating a position where the peeling belt 22 starts to contact the tracking roller 25 is indicated by a line segment L4.
5 is parallel to the central axis 25a, the peeling belt 22 moves in a direction perpendicular to the rotation axis 25a indicated by the arrow A1, and the belt shift does not occur. In this case, a point at which one edge 22 sl of the peeling belt 22 starts to contact the tracking roller 25 is indicated by a.

On the other hand, as shown in FIG. 2B, a line segment L5 indicating the position where the peeling belt 22 starts to contact the tracking roller 25 is defined by the center axis 2 of the tracking roller 25.
When the peeling belt 22 has a certain angle with 5a, the peeling belt 22 moves in a direction perpendicular to the line L5 indicated by the arrow A2, that is, in a direction having a certain angle with the central axis 25a. Therefore, in this case, as the peeling belt 22 moves, the distance formed by the center line 25a and the line segment L5 moves toward the wider direction. In this case,
The point at which one edge 22 sl of the peeling belt 22 starts contact with the tracking roller 25 is indicated by b.

In FIG. 2C, a line segment L6 indicating the position where the peeling belt 22 starts to contact the tracking roller 25 is represented by a central axis 25a of the tracking roller 25,
FIG. 2B shows a case in which the angle is opposite to that in the case shown in FIG. In this case, the peeling belt 22 has an arrow A
3 in the direction perpendicular to the line segment L6, that is, the central axis 2
5a and a direction having an angle opposite to that shown in FIG. 2B. Therefore, in this case, as the peeling belt 22 moves, the distance between the center line 25a and the line segment L6, which is a direction perpendicular to the line segment L6, becomes larger. In this case, a point at which one edge 22 sl of the peeling belt 22 starts to contact the tracking roller 25 is indicated by c.

As described above, the deviation of the peeling belt 22 from the belt changes depending on the position where the peeling belt 22 first contacts the tracking roller 25. Since L4, L5, and L6 shown in the above description are line segments along the surface of the tracking roller 25, it is not possible to strictly consider the angle with the center line 25a. However, for the sake of convenience of description, each line segment has an angle formed by a line segment in which each line segment L4, L5, L6 is orthogonally projected on the surface of the peeling belt 22 and a line segment in which the center line 25a is orthogonally projected on the surface of the peeling belt 22. L
4, L5, L6 and the center line 25a.

As described above, in this apparatus, the belt deviation of the peeling belt 22 can be corrected by adjusting the position where the peeling belt 22 and the tracking roller 25 first contact.

Next, a method of detecting a slight belt deviation within the deviation control width of the peeling belt 22 in this apparatus will be described. FIG. 3 is a schematic configuration diagram showing an example of the configuration of the light belt deviation detection means and the control means. The light belt deviation detecting means includes two reflected light detection sensors 101 and 102 arranged in a direction perpendicular to the moving direction of the peeling belt 22, and a support portion 103 supporting the sensors. Also, the control means includes a microcomputer (not shown) that executes a slight deviation determination program for determining the deviation direction of the peeling belt 22 using the outputs of the sensors 101 and 102. It consists of.

In the discrimination program, if the state shown in FIG. 3A, that is, the inner sensor 101 detects the reflected light and the outer sensor 102 does not detect the reflected light, it is assumed that the belt has not shifted. to decide. FIG.
The state shown in (b), that is, both sensors 101, 10
If both sensors detect reflected light, it is determined that the peeling belt 22 has shifted to the side where both sensors are provided. If both sensors 101 and 102 do not detect light, it is determined that a belt shift has occurred on the side opposite to where both sensors are provided. When it is determined by the above determination program that the peeling belt 22 has a belt shift, the belt shift is corrected by the above-described belt shift correcting operation.

Next, the abnormality detecting means of the peeling belt 22 will be described in detail. As shown in FIGS. 4A and 4B,
Belt surface detectors 49, 5 as belt abnormality detecting means
0 is the light emitting elements 55 and 56 and the light receiving element 5 respectively.
Photointerrupters 53 and 54 as lever operation detecting members having the members 7 and 58, and fillers 51 and 5 as lever-shaped members whose leading end portions are in sliding contact with the surface of the peeling belt 22 under pressure
And 2. Although the fillers 51 and 52 are provided with a rotation behavior in the direction of arrow D in FIG. 4A around the support shaft S, the other end is in contact with the peeling belt 22 under pressure when the leading end thereof is in sliding contact. Are the light emitting element 55 and the light receiving element 5 respectively.
7, it is located between the light emitting element 56 and the light receiving element 57.
Therefore, the light emitted from the light emitting elements 55 and 56 is blocked by the fillers 51 and 52 and does not reach the light receiving elements 57 and 58 by the above-mentioned pressure sliding.

When the leading ends of the fillers 51 and 52 fall into tear holes formed near both edges of the peeling belt 22 or separate from the both edges due to excessive belt movement of the peeling belt 22, 51 and 52 operate in the direction of arrow D. By the operation of the fillers 51 and 52,
Light shielding of the light receiving element 57 by the filler 51, the filler 52
The light-shielding of the light receiving element 58 due to is released. When the light blocking of the light receiving element 57 or the light receiving element 58 is released in this manner, the signal is transmitted to the control unit as shown in FIG. 1, and the control unit controls the motor 1 which is the driving source of the cleaning roller 41. By stopping, the cleaning roller 41 and the backup roller 27 are prevented from directly sliding. In the present embodiment, the control unit also stops the motor 2 which is a driving source of the peeling belt 22 and the heating drum 21 at the same time as the motor 1, thereby preventing the damage of the peeling belt 22 from spreading. .

In this embodiment, the filler 51,
Light emitting elements 55 and 56 and light receiving elements 57 and 58 which are optical sensors
However, the means for directly detecting the surface abnormality of the peeling belt 22 is physical means such as the sliding contact of the fillers 51 and 52 under pressure. In addition, the light emitting elements 55 and 56 and the light receiving elements 57 and 58 Since it is located at a position distant from the peeling belt 22 that emits dust and is covered by the fillers 51 and 52, malfunction due to contamination of dust and the like is unlikely to occur. Instead of using an optical sensor, an electric sensor that is resistant to dust contamination, such as a limit switch, may be used.

Next, the arrangement of the belt surface detectors 49 and 50 will be described in detail. As shown in FIG. 5, the peeling belt 22 is separated by the belt deviation correcting means.
The belt is conveyed while correcting the belt deviation within the deviation control width 2 × S at the edge of the second.

The above-mentioned belt surface detectors 49 and 50 are shown in FIG.
And at the positions shown in FIG. At this time, the width of the peeling belt 22 and the belt surface detector 4
Assuming that the arrangement width between 9 and 50 and the maximum meandering width when the peeling belt 22 meanders by the belt deviation correcting means are 2 × L0, 2 × L, and 2 × L1 as shown in FIG. The surface detectors 49 and 50 are provided between the peeling device 20 and the cleaning device 40 located on the transport direction side of the peeling belt 22 with respect to the peeling device 20, respectively.
It is arranged so that 0−S> L, and as close as possible to both edges of the peeling belt 22. Therefore, as long as the peeling belt 22 is meandered and conveyed within a range of the maximum meandering width of 2 × L1 when meandering by the belt deviation correcting means in a state in which the peeling belt 22 is not broken near both edges, the fillers 51 and 52 are the peeling belts. Because it comes into sliding contact with 22
Belt deviation within the deviation control width is not detected as excessive belt deviation.

However, if an excessive belt deviation exceeding the above-mentioned belt deviation control width occurs, or if a tear hole is formed near both edges of the peeling belt 22 due to damage, the filler 51 may be damaged.
Or, the leading end of 52 is detached from both edges of the peeling belt 22 or falls into the tear hole,
A belt abnormality of the peeling belt 22 is detected.

Here, the peeling belt 22 is most stressed when its surface is in the peeling device 20 which is pressed by the pressing roller 28. Further, when a belt-shaped member such as the peeling belt 22 receives stress, destruction often starts from an edge portion that is vulnerable to directional stress. For this reason, by monitoring the tearing of both edges of the peeling belt 22 between the peeling device 20 and the cleaning device 40, most of the belt breakage can be detected before passing through the cleaning device 40.

Further, as shown in FIG. 6, the length of the backup roller 27 in the belt width direction is 2 × (L0 +
a), assuming that the length of the cleaning roller 41 in the belt width direction is 2 × L2 = 2 × (L0−c), since a> S and c> S, the peeling belt 22 is located near both edges. The backup roller 27 and the cleaning roller 41 do not come into direct sliding contact with each other as long as the belt is conveyed in a meandering width of 2 × L1 when it is meandered by the belt deviation correcting means in a state where the belt is not broken. The roller 27 is not damaged.

[0053]

According to the first aspect of the present invention, the belt surface detector provided near the edge of the belt-shaped member can detect both the belt shift and the tear at the edge of the belt-shaped member. The belt abnormality detecting means can be provided at a low cost. Further, since the means for directly detecting the surface of the belt-shaped member is a physical means, there is no malfunction due to contamination by dust or the like, and there is an excellent effect that the abnormality of the belt can be reliably detected.

According to the second aspect of the present invention, since the pair of lever-shaped members are brought into sliding contact with each other in the vicinity of both edges of the belt-shaped member, the belt shifts in the direction of both edges of the belt-shaped member. There is an excellent effect that both tears near both edges of the belt-shaped member can be detected.

According to the third aspect of the present invention, a slight deviation of the belt within the deviation control width is not detected as abnormal.
There is an excellent effect that it is possible to detect only an excessive belt shift that cannot be corrected by the belt shift correcting means or a tear near both edges of the belt-shaped member.

According to the fourth aspect of the present invention, a pair of belt surface detectors provided near both edges of the belt-like peeling member are used to detect the belt shift in the direction of both edges of the belt-like peeling member. Since both breaks near both edges of the belt-shaped peeling member can be detected, belt abnormality detecting means can be provided at low cost. In addition, the two belt surface detectors detect the tear before the cleaning device passes when the tear occurs near both edges of the belt-shaped peeling member. Therefore, the backup member and the cleaning member Has an excellent effect that the abnormality of the belt-shaped peeling member can be detected before the belt-shaped peeling member comes into direct contact with the through hole.

According to the fifth aspect of the present invention, as long as the belt-like peeling member is conveyed in a meandering manner within the deviation control width of the belt deviation correcting means in a state in which both edges are not broken, Since there is no direct sliding contact between the backup member and the cleaning member at both edges of the member, there is an excellent effect that the backup member is not damaged.

According to the sixth aspect of the present invention, when the belt surface detector does not detect the surface of the belt-shaped peeling member, at least the rotation of the cleaning member is stopped to allow the backup member and the cleaning member to rotate. Since the direct sliding contact is prevented, there is an excellent effect that the cleaning member does not damage the backup member after the belt surface detector stops detecting the surface of the belt-shaped peeling member.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a recording material reproducing apparatus according to an embodiment of the invention.

FIGS. 2A to 2C are explanatory views showing a top position where a peeling belt and a tracking roller included in the recording material reproducing apparatus start contacting;

FIGS. 3A to 3C are explanatory diagrams showing a schematic configuration of a light belt deviation detection sensor of the recording material reproducing apparatus.

FIG. 4A is a perspective view of a belt surface detector used in the recording material reproducing apparatus. (B) is an explanatory view of a light emitting element and a light receiving element used in the belt surface detector.

FIG. 5 is a side view showing an installation position of the belt surface detector in the recording material reproducing apparatus.

FIG. 6 is a side view showing an arrangement of a backup roller and a cleaning roller used in the recording material reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording material 2 Transport roller 10 Liquid supply part 11 Pressing roller 12 Liquid application roller 13 Liquid supply roller 14 Liquid supply tray 15 Stripping liquid 20 Stripping device 21 Pressure drum 22 Stripping belt 23 Drive roller 24 Support roller 25 Tracking roller 26 Tension Spring 27 Backup roller 28 Pressure roller 29 Heater 30 Separation claw 40 Cleaning unit 41 Cleaning roller 42 Collection container 43 Collection blade 44 Image forming substance 49, 50 Belt surface detector 51, 52 Filler 53, 54 Photointerrupter 60, 61 Discharge roller 70 Center Line 101 Light Belt Deviation Detection Sensor 102 Light Belt Deviation Detection Sensor 103 Light Belt Deviation Detection Sensor Support

Claims (6)

[Claims] 1. A belt conveying device having a belt-like member whose surface is driven to move along a predetermined path, wherein the belt-like member is arranged near an edge of the belt-like member, and a tip end of the belt-like member is provided. A belt conveying device comprising a belt surface detector having a lever-shaped member that comes into sliding contact with a surface and a lever operation detecting member that detects an operation of the lever-shaped member in a pressing direction. 2. The belt conveying device according to claim 1, wherein a pair of said belt surface detectors are arranged near both edges of said belt-shaped member. 3. The belt conveying device according to claim 2, further comprising a belt deviation correcting means for automatically correcting a slight deviation of the belt in the direction of both edges of the belt-shaped member. The difference between the belt deviation correction means and the deviation control width at the edge of the belt-shaped member is larger than the arrangement width between the two belt surface detectors, and the center line of the arrangement width and the belt-shaped member So that the center line of the maximum meandering width when meandering by the belt shift correcting means overlaps,
A belt conveying device comprising the two belt surface detectors. 4. A surface of a belt-like peeling member capable of exerting a larger adhesive force to an image forming material than a recording material contacts the image forming material adhering the surface to the recording material. A separating device that separates the image forming substance from the recording material by separating, and a cleaning device that is located on the transport direction side of the belt-shaped separating member from the separating device and that removes the image forming substance attached to the surface. A recording material reproducing apparatus using a belt conveying device driven so as to move through the apparatus, in the vicinity of both edges of the belt-shaped peeling member, and between the peeling device and the cleaning device. The belt surface detection has a lever-shaped member which is disposed in a pair at a position, and whose leading end is in sliding contact with the surface of the belt-shaped peeling member, and a lever operation detecting member which detects an operation of the lever-shaped member in a pressing direction. A container And a recording material reproducing apparatus using the belt transport device. 5. A recording material reproducing apparatus according to claim 4, further comprising: belt deviation correcting means for automatically correcting a slight deviation of the belt in the direction of both edges of the belt-shaped peeling member; Arrangement width between containers, width of the belt-shaped peeling member, maximum meandering width when the belt-shaped peeling member meanders by the belt deviation correcting means, length of the backup member in the belt width direction, and cleaning The respective members are arranged so that the respective center lines of the length in the belt width direction of the members are all overlapped, and the width of the belt-shaped peeling member and the deviation control at the edge of the belt-shaped peeling member of the belt deviation correcting means. The difference between the width is greater than the arrangement width between the two belt surface detectors, and the difference between the length of the backup member in the belt width direction and the width of the belt-like peeling member, 2. A recording material reproducing apparatus according to claim 1, wherein a difference between a width of the cleaning member and a length of the cleaning member in a belt width direction is larger than a deviation control width at an edge of the belt-shaped peeling member. 6. A recording material reproducing apparatus using a belt conveying device according to claim 5, wherein said cleaning device is in contact with said rotating cleaning member and said backup member press-contacting said cleaning member via said belt-shaped peeling member. A recording material reproducing apparatus, further comprising means for stopping rotation of the cleaning member when the belt surface detector does not detect the surface of the belt-shaped peeling member.